A two-component water-based inorganic non-intumescent fireproof coating and its preparation method

Abstract

The invention discloses a two-component water-based inorganic non-intumescent fireproof coating and a preparation method thereof, which is composed of two components A and B. The A component is composed of the following raw materials in mass percentage: 42-50% of silica sol, 29-33% of pigment and filler, 18-23% of deionized water, 0.07-0.08% of dispersant, 0.18-0.20% of anti-settling agent, Preservative 0.1-0.3%, AMP950.1-0.15%, defoamer 0.05-0.07%, antifreeze 1.6-1.8%; the mass percentage of the B component is composed of: anhydrous acetic acid 1.2-1.8%, methyl trimethyl Oxysilane 98.2-98.8%. When using, stir and mix components A and B according to a certain ratio, then mature, and then air spray on acid-resistant substrates such as aluminum alloys and stainless steels that have been sandblasted. The coating of the invention has the advantages of environmental protection, high temperature resistance, noncombustibility in case of fire, no expansion, no smoke emission, acid and alkali resistance, long shelf life at normal temperature, and curing at normal temperature.

Description

technical field [0001] The invention relates to a fireproof coating and a method for preparing the fireproof coating. Background technique [0002] Organic intumescent fireproof coatings are widely used for their excellent physical and chemical properties and fireproof performance, especially in the application of ultra-thin coatings or protective coatings on metal surfaces, mostly organic solvent-based. However, this kind of coating has a lot of pollution, high VOC emissions, and high cost during production and use, and produces toxic gas and dense smoke when it expands in case of fire. With the increasingly prominent energy and environmental issues, fire retardant coatings are developing in the direction of water-based, non-expanding, and inorganic materials that are environmentally friendly. Inorganic non-intumescent fire retardant coatings have become the development trend of fire retardant coatings due to their advantages of environmental protection, low cost, non-comb...

AI Technical Summary

Problems solved by technology

) related studies have found that this kind of coating has a short stable time and a shelf life of only about 7 days. Even if ethanol, isopropanol and other small molecule alcohols are added as stabilizers, the stable period is difficult to exceed 1 month, which greatly affects practicality

[0006] The above-mentioned fire-proof, high-temperature-resistant one-component coatings prepared from water-based silica sol as raw material, chemically modified with organosilane, and used as film-forming substances usually have a relatively short stability period or require low-temperature storage

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